My pool was recently opened by the pool company. i am a newbie( the pool came with the house)and plan to do my own maintainace. I noticed that after a day or so the water was sluggish coming out of the return. i have been told that i need to backwash. I have a Pentair FNS plus filter which requires 6 lbs of De.
1. After I perform the backwash rinse cycles, do I have to release air from the air valve of the filter?
2. Can you add the De directly to the skimmer or do you have to mix the DE with water and the pour it in the skimmer?